Bolehla sesuai dgn harga, tip pen tu tajam and takleh tukar, i dah try pull out to change but cannot. Tulis tu okay cuma kdg2 tgh tulis tu pndai tak detect, tulisan mcm habis ink (terputus2) tpi takla berlaku selalu. Klw prioritize smoothness better go for expensive one, klw tak kesah ambil lah ni